diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1
index f5c9ea596d..54c63e2e3b 100644
--- a/DOCS/man/en/mplayer.1
+++ b/DOCS/man/en/mplayer.1
@@ -4900,6 +4900,10 @@ Force quantization parameter (default: 0, use QP from video).
 0: hard thresholding (default)
 .br
 1: soft thresholding (better deringing, but blurrier)
+.br
+4: like 0, but also use B-frames' QP (may cause flicker)
+.br
+5: like 1, but also use B-frames' QP (may cause flicker)
 .RE
 .
 .TP